It’s very dangerous ______ _ children to cross the busy street.
Our teachers gave us some ______ on how to learn English well.
—I prefer speaking to listening in English learning. —Oh, really! I think you should be good at ______ of them.
—Your sweater looks nice, is it made of wool? —Yes, and it’s made ______ Shanghai.
—Mom, shall we have supper now? —Oh, we won’t have supper ______ your dad comes back.
—Did you get there by ______ bike? —No, I took ______ taxi.